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Updated: Jul 19, 2026
08:57
Acute and Chronic Tactile Sensory Testing after Spinal Cord Injury in Rats
Published on: April 4, 2012
Summary
Cutaneous saltation, an illusory displacement of touch, was altered by a prior stimulus. This preconditioning stimulus repelled the perceived location of the saltation, suggesting central nervous system involvement.
Area of Science:
- Neuroscience
- Somatosensory Perception
- Psychophysics
Background:
- Cutaneous saltation is the illusory displacement of a tactile sensation.
- Previous research suggests that sensory aftereffects can influence subsequent perceptions.
Purpose of the Study:
- To investigate how a preconditioning stimulus affects cutaneous saltation.
- To explore the mechanisms underlying sensory aftereffects in tactile perception.
Main Methods:
- A vibratory preconditioning stimulus was applied to a skin locus distant from the saltatory test.
- The intensity, locus, and number of preconditioning stimuli were varied.
- The direction and magnitude of the saltatory phantom's displacement were recorded.
Main Results:
- A prior stimulus (preconditioning) repelled the perceived location of cutaneous saltation.
- The displacement direction was consistently away from the preconditioning stimulus site.
- The magnitude and recovery rate of the saltation depended on preconditioning parameters.
Conclusions:
- The findings support central nervous system mechanisms, rather than peripheral adaptation, in explaining these tactile aftereffects.
- Cutaneous saltation exhibits properties analogous to figural aftereffects in other sensory modalities.
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